The correct answer is not C but A.Max@Math Revolution wrote:In DS, Variable approach is the easiest and quickest way to find the answer without actually solving the problem.
Remember equal number of variables and equations ensures a solution.
In original condition, 3c+5b+5i=195 then question is 7c+11b+9i=?
In this case, we have 3 variables (c,b,i) and 1 equation (3c+5b+5i=195)
We need 2 more equations. In this case, (1) is 1 equation, (2) is 1 equation so we have 2 equations. So C is the answer.
Why C? If you know our own innovative logics to find the answer, you don't need to solve the problem.
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The question stem does not require that we be able to solve for the 3 unknowns discussed in the problem.
Rather, the question stem asks only for the value of an EXPRESSION: 7c + 11b + 9i.
Given the information in Statement 1, we can determine the value of this expression.